A car went up the hill at the speed of 35 km/h and came backa t speed of 60km/h. Find average speed
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Answer: 44.21 km / hr
Explanation: let the distance be x
So it has to travel x km from down portion to hill and x km from hill to down
There for total distance = x + x = 2x
Time taken to go up to the hill = x/35
Time taken to go down from the hill = x/60
Average speed = total distance / total time
= (x+x) / (x/35+x/60)
= 2x / (19x/420)
= 840 / 19
= 44.21 km / hr
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